Most lymphoma patients initially present with painless swelling of superficial lymph nodes. The first examination typically includes an ultrasound of these superficial lymph nodes. If the ultrasound suggests a high probability of malignancy, a lymph node excision biopsy can be performed. A lymph node excision biopsy and subsequent pathological confirmation is the gold standard for diagnosing lymphoma. Furthermore, it is common for lymphoma patients to undergo PET-CT scans, which are used to determine the stage at initial diagnosis and to assess the effectiveness of treatment after therapy.